Marilyn Gay Duff, MSW, LICSW
Clinical Social Worker · Tacoma, WA
Marilyn Gay Duff, MSW, LICSW is a clinical social worker with a practice address in Tacoma, Washington, and NPI 1871606814, issued on Aug 16, 2006. Check the license (Washington LW00007888, as entered in NPPES) with the Washington board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Marilyn Gay Duff
- Credential
- MSW, LICSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- LW00007888 WA
Self-reported in NPPES; status is on the state search - Practice location
- 9600 Veterans Dr SW, Tacoma, WA 98493
- Phone
- (253) 583-1648
- Enumerated
- Aug 16, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 6,382 in Washington → Look up another NPI →
Also registered at 9600 Veterans Dr SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charles AllenSocial Worker1760802482
- Yolande Allen, LCSW-CClinical Social Worker1396998126
- Derek Anderson, PH.D.Clinical Psychologist1003364928
- Lisa AndersonOccupational Therapist1982342895
- Joseph Anderson-Gutierrez, PSY.D.Health Psychologist1992654016
- Amir ArefInternal Medicine Physician1063522126
Verify Marilyn Gay Duff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license LW00007888Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Marilyn Gay Duff among 6,382 clinical social worker records in Washington
Marilyn Gay Duff, MSW, LICSW is one of 6,382 clinical social worker records with a practice address in Washington. 9% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than under 1% of them.
- NPI issued2006 · under 1% of these records are older, 90% newer
- In a Medicare fileNo · 9% of these records are
- In the CMS Doctors and Clinicians fileNo · 15% of these records are
- Record last updated2007 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
518 clinical social worker records list a practice address in Tacoma
They are 518 of the 13,715 NPPES records with a practice address in Tacoma, and 6,382 clinical social worker records in Washington. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 6,382 in Washington → Every provider in Tacoma → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Berta Balli, MSW, LCSWTacoma, WA 984931356382683
- Ralph Dalisky, MSW, LICSWTacoma, WA 984931720194962
- Patricia France, LICSW, CDP, BCDTacoma, WA 984931063495018
- Linda Gillespie-Gateley, MSWTacoma, WA 984931609820695
- David GronsethTacoma, WA 984931174638522
- Monica Kiehl, MSWTacoma, WA 984931629171087
- Linda McKendry, LICSW,MSWTacoma, WA 984931487766564
- Ted Mears, MSW LICSWTacoma, WA 984931255437398
Common questions
What is Marilyn Gay Duff, MSW, LICSW's NPI number?
Marilyn Gay Duff, MSW, LICSW's National Provider Identifier (NPI) is 1871606814, issued on Aug 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marilyn Gay Duff, MSW, LICSW located?
The NPPES record lists a practice address at 9600 Veterans Dr SW, Tacoma, WA, 98493. Phone: (253) 583-1648. Providers update this record themselves, so call before visiting.
How can I verify Marilyn Gay Duff, MSW, LICSW's license?
NPPES lists Washington license number LW00007888, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.